Fix get_ping_properties

Remove lazy JSON parsing.

0.8.2

Update histogram_tools.py (#157)

The new version includes a check to ignore unknown
keys in the histograms file when ran from the pipeline.

0.8.1

bug 1364556 - update histogram_tools to latest m-c version.

0.8.0

Update histogram_tools.py to latest version

0.7.0

New select() method, misc. bugfixes

0.6.6

Bug 1349608 - Improve Dataset handling of small pings

The idea here is to use a greedy algorithm to balance the RDD partition
in terms of number of files (first) and total size of each partition.

0.6.5

Bug 1347283 - Add support decoding invalid UTF8 strings (#117)

0.6.4

Make it clear in the docs that HBaseMainSummaryView is experimental

0.6.3

Add snappy as dependency

0.6.2

Bug 1337995 - pin protobuf version